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go / smtp で添付ファイル付きメール送信
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package main | |
import ( | |
"crypto/tls" | |
"fmt" | |
"net/mail" | |
"net/smtp" | |
"github.com/scorredoira/email" | |
) | |
const ( | |
MAIL_SUBJECT = "mail subject" | |
MAIL_BODY = "body" | |
FROM_NAME = "from_name" | |
FROM_ADDRESS = "from@example.com" | |
TO_ADDRESS = "to@example.com" | |
CSV_FILENAME = "test.csv" | |
) | |
func buildCSV() string { | |
return "asdf,fuga,piyo" | |
} | |
func sendMail() error { | |
m := email.NewMessage(MAIL_SUBJECT, MAIL_BODY) | |
m.From = mail.Address{Name: FROM_NAME, Address: FROM_ADDRESS} | |
m.To = []string{TO_ADDRESS} | |
if err := m.AttachBuffer(CSV_FILENAME, []byte(buildCSV()), false); err != nil { | |
return err | |
} | |
auth := smtp.PlainAuth("", "example@gmail.com", "password", "smtp.gmail.com") | |
tlsconfig := &tls.Config{ | |
InsecureSkipVerify: true, | |
ServerName: "smtp.gmail.com", | |
} | |
conn, err := tls.Dial("tcp", "smtp.gmail.com:465", tlsconfig) | |
if err != nil { | |
fmt.Println("tls dial error") | |
return err | |
} | |
c, err := smtp.NewClient(conn, "smtp.gmail.com") | |
if err != nil { | |
fmt.Println("smtp client error") | |
return err | |
} | |
if err := c.Auth(auth); err != nil { | |
fmt.Println("smtp auth error") | |
return err | |
} | |
// To && From | |
if err = c.Mail("from@example.com"); err != nil { | |
fmt.Println("smtp from error") | |
return err | |
} | |
if err = c.Rcpt("to@example.com"); err != nil { | |
fmt.Println("smtp rcpt error") | |
return err | |
} | |
// Data | |
wd, err := c.Data() | |
if err != nil { | |
fmt.Println("smtp data error") | |
return err | |
} | |
_, err = wd.Write(m.Bytes()) | |
if err != nil { | |
fmt.Println("smtp write error") | |
return err | |
} | |
err = wd.Close() | |
if err != nil { | |
fmt.Println("smtp close error") | |
return err | |
} | |
c.Quit() | |
return nil | |
} | |
func main() { | |
err := sendMail() | |
if err != nil { | |
panic(err) | |
} | |
} |
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